[jira] [Created] (YARN-10397) SchedulerRequest should be forwarded to scheduler if custom scheduler supports placement constraints

["Bilwa S T (Jira)" <ji...@apache.org>]

Bilwa S T created YARN-10397:
--------------------------------

             Summary: SchedulerRequest should be forwarded to scheduler if custom scheduler supports placement constraints
                 Key: YARN-10397
                 URL: https://issues.apache.org/jira/browse/YARN-10397
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Bilwa S T
            Assignee: Bilwa S T


Currently only CapacityScheduler supports placement constraints so request gets forwarded only for capacityScheduler. Below exception will be thrown if custom scheduler supports placement constraint
{code:java}
if (request.getSchedulingRequests() != null
        && !request.getSchedulingRequests().isEmpty()) {
      if (!(scheduler instanceof CapacityScheduler)) {
        String message = "Found non empty SchedulingRequest of "
            + "AllocateRequest for application=" + appAttemptId.toString()
            + ", however the configured scheduler="
            + scheduler.getClass().getCanonicalName()
            + " cannot handle placement constraints, rejecting this "
            + "allocate operation";
        LOG.warn(message);
        throw new YarnException(message);
      }
    }
{code}
I think we should make this configurable
 



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